JPS6355485A - Liquid scintillation counter device - Google Patents
Liquid scintillation counter deviceInfo
- Publication number
- JPS6355485A JPS6355485A JP61197986A JP19798686A JPS6355485A JP S6355485 A JPS6355485 A JP S6355485A JP 61197986 A JP61197986 A JP 61197986A JP 19798686 A JP19798686 A JP 19798686A JP S6355485 A JPS6355485 A JP S6355485A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- systems
- signal
- multipliers
- simultaneous counting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title description 6
- 238000005567 liquid scintillation counting Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 abstract description 18
- 230000005855 radiation Effects 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 239000010453 quartz Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 10
- 229910052796 boron Inorganic materials 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000010183 spectrum analysis Methods 0.000 description 3
- 229910052722 tritium Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- XREXPQGDOPQPAH-QKUPJAQQSA-K trisodium;[(z)-18-[1,3-bis[[(z)-12-sulfonatooxyoctadec-9-enoyl]oxy]propan-2-yloxy]-18-oxooctadec-9-en-7-yl] sulfate Chemical compound [Na+].[Na+].[Na+].CCCCCCC(OS([O-])(=O)=O)C\C=C/CCCCCCCC(=O)OCC(OC(=O)CCCCCCC\C=C/CC(CCCCCC)OS([O-])(=O)=O)COC(=O)CCCCCCC\C=C/CC(CCCCCC)OS([O-])(=O)=O XREXPQGDOPQPAH-QKUPJAQQSA-K 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- YZCKVEUIGOORGS-IGMARMGPSA-N Protium Chemical compound [1H] YZCKVEUIGOORGS-IGMARMGPSA-N 0.000 description 1
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005250 beta ray Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は液体シンチレーション計数装置に関する。詳し
くは、本発明は、光電子増倍管の配置と電気回路に工夫
をこらすことにより、主として低エネルギーβ線放出放
射性核種・三重水素（トリチウム）の放射能測定におい
て、高効率測定と化学発光（ケミカルルミネッセンス）
除去測定ができて微量放射能を高精度測定するために利
用される液体シンチレーション計数装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a liquid scintillation counting device. Specifically, the present invention achieves high efficiency measurement and chemiluminescence (tritium) radioactivity measurement mainly for low-energy β-ray emitting radionuclides and tritium by devising the arrangement of photomultiplier tubes and electric circuits. chemical luminescence)
This invention relates to a liquid scintillation counting device that is capable of removal measurement and is used for highly accurate measurement of trace amounts of radioactivity.
（従来の技術）
従来の液体シンチレーション計数装置においては、２本
の光電子増倍管をバイアル瓶に面するように１８０°に
対向して配置し、各光電子増倍管からのタイミング信号
を２系統中２系統作動計数回路で計数する方法が採られ
て来た。（参考文献：南山堂発行、石川寛昭著「液体シ
ンチレーション測定法」の第５章「計数装置の機構」）
（発明が解決しようとする問題点）
本発明は次の３点を解決せんとするものである。(Prior Art) In a conventional liquid scintillation counting device, two photomultiplier tubes are arranged facing each other at 180 degrees so as to face a vial, and timing signals from each photomultiplier tube are transmitted through two systems. A method of counting using a counting circuit operating in two systems has been adopted. (Reference: Chapter 5 “Mechanism of counting device” in “Liquid Scintillation Measurement Method” by Hiroaki Ishikawa, published by Nanzando)
(Problems to be Solved by the Invention) The present invention attempts to solve the following three points.
（１）低効率
従来型の液体シンチレーション計数装置は三重水素（ト
リチウム）に対する計数効率が低い。(1) Low efficiency Conventional liquid scintillation counting devices have low counting efficiency for tritium.
（１０〜３０％）
（２）化学発光（ケミカルルミネッセンス）による疑似
計数
化学発光とは液体シンチレータ−と測定試料を混合した
時化学的励起によって生じる発光のことで、アルカリ性
測定試料では、この化学発光が高頻度で長時間持続し、
誤差要因となる。(10-30%) (2) Pseudo-counting due to chemiluminescence Chemiluminescence refers to the luminescence produced by chemical excitation when a liquid scintillator and a measurement sample are mixed. is frequent and lasts for a long time,
This becomes a cause of error.
（３）測定モード選択の煩雑さ
化学発光のないサンプルは高効率だけを目標にした測定
モード、他方、化学発光のあるサンプルは化学発光を除
去する測定モードと言うように、サンプルの性質に応じ
て測定モードを選ぶ必要がある。(3) Complications in selecting measurement modes Depending on the nature of the sample, for example, a sample without chemiluminescence may be placed in a measurement mode that aims only at high efficiency, whereas a sample with chemiluminescence may be placed in a measurement mode that removes chemiluminescence. You need to select the measurement mode.
（問題点を解決するための手段）
＋１１効率について
本発明においては、３本の光電子増倍管をバイアル瓶に
面するように配置し、２本を用いる従来型装置よりバイ
アル瓶を見込む立体角を大きくするとともに、３系統中
２系統作動同時計数回路を使用することによって、従来
法の２系統中２系統作動同時計測回路で落とされる事象
も観測でき、これにより従来型よりも高効率が得られる
。ここに、２系統中２系統作動同時計測回路とは、三つ
の信号入力部（Ａ、Ｂ、Ｃ）を有し、そのうちの少なく
とも二つのの信号入力部（八とＢ、 ＢとＣＩ ＣとＡ
。(Means for solving the problem) Regarding the +11 efficiency, in the present invention, three photomultiplier tubes are arranged so as to face the vial, and the solid angle looking into the vial is lower than that of the conventional device using two photomultiplier tubes. In addition to increasing the number of systems, by using a simultaneous counting circuit that operates on two of the three systems, it is possible to observe events that would be missed by the simultaneous counting circuit that operates on two of the two systems in the conventional method, thereby achieving higher efficiency than the conventional type. It will be done. Here, the simultaneous measurement circuit for two out of two systems has three signal input sections (A, B, C), and at least two of them have signal input sections (8 and B, B and CI, C and A
.
ＡとＢとＣ）に決められた時間幅（分解時間）内にパル
ス入力が起これば、同時計数信号パルスが出力するもの
である。なおまた、３系統中３系統作動同時計数回路と
は三つの信号入力部を有し、三つの信号入力部全てにパ
ルス入力が分解時間内に起きれば同時計数信号パルスを
出力するものである。これらにおける電気回路は既存の
電子技術で製作可能で、Ｎ１Ｍモジュールとして市販さ
れている。If a pulse input occurs within the time width (resolution time) determined by A, B, and C), a coincidence signal pulse is output. Furthermore, a coincidence counting circuit operating in three of the three systems has three signal input sections, and outputs a coincidence signal pulse if a pulse input occurs to all three signal input sections within the resolution time. The electrical circuits in these can be fabricated using existing electronic technology and are commercially available as N1M modules.
（２）化学発光による疑似計数について化学発光は単一
光子の偶発放出現象であるので、３個の光電子増倍管へ
同時に化学発光の光子が入射する確率は、２個の光電子
増倍管へ同時に入射する確率に比べて格段に小さい。そ
こで、本発明においては、従来法より光電子増倍管を増
やして３本とし、３系統中３系統作動同時計数回路を用
いることにより化学発光除去測定ができるようにした。(2) Pseudo-counting due to chemiluminescence Since chemiluminescence is a phenomenon of accidental emission of single photons, the probability that chemiluminescent photons will simultaneously enter three photomultiplier tubes is as follows: The probability of both being incident at the same time is much smaller. Therefore, in the present invention, the number of photomultiplier tubes is increased to three compared to the conventional method, and three of the three systems are operated using coincidence circuits, thereby making it possible to perform chemiluminescence removal measurement.
なお、放射線発光は複数個の光子が同時に全方向に放出
されるので、本発明の装置でも計数することができ、実
用的効率が得られる。Note that since a plurality of photons are simultaneously emitted in all directions in radiation emission, the device of the present invention can also be counted, and practical efficiency can be obtained.
（３）測定モード選択の煩雑さについて前項（１）及び
（２）において注意すべきことは、高効率化と化学発光
除去測定が同時に行い得ないことである。すなわち、前
項（１）において示された手段は化学発光に関しては改
善策にはならないし、また前項（２）において示された
手段は効率の改善策とはならない。従って、サンプルの
性質に応じて、化学発光のないものは前項（ｌ）の手段
で、化学発光のあるものは前項（２）の手段と言うよう
に測定手法を適宜選択する必要がある。(3) Regarding the complexity of selecting a measurement mode What should be noted in the previous sections (1) and (2) is that high efficiency and chemiluminescence removal measurement cannot be performed at the same time. That is, the means shown in the preceding section (1) do not serve as a measure for improving chemiluminescence, and the means shown in the preceding section (2) do not serve as a measure for improving efficiency. Therefore, depending on the nature of the sample, it is necessary to appropriately select the measurement method, such as using the method described in (l) above for samples without chemiluminescence, and using the method described in (2) above for samples with chemiluminescence.
本発明においては、３本の光電子増倍管が、どの場合で
も、共用できることに着目し、１台の液体シンチレーシ
ョン計数装置に３本の光電子増倍管、３系統中２系統作
動同時計数回路及び３系統中３系統作動同時計数回路を
具備させることによって、１台で２種の機能を備えた液
体シンチレーション計数装置を達成することができた。In the present invention, we focused on the fact that three photomultiplier tubes can be used in common in any case, and one liquid scintillation counting device includes three photomultiplier tubes, two out of three systems operating coincidence circuit, and By equipping three of the three systems with simultaneous counting circuits, it was possible to achieve a liquid scintillation counting device with two types of functions in one device.
本発明の液体シンチレーション計数装置は、３本の光電
子増倍管を共用し、１台の装置で、化学発光のないサン
プルに対しては、３系統中２系統作動同時計数回路で高
効率測定が、また化学発光のあるサンプルに対しては、
３系統中３系統作動同時計数回路で化学発光除去測定が
極めて簡便に行うことができる。The liquid scintillation counting device of the present invention uses three photomultiplier tubes in common, and can perform high-efficiency measurements for samples without chemiluminescence using two out of three systems operating coincidence circuits. , and for chemiluminescent samples,
Chemiluminescence removal measurement can be performed extremely easily with three out of three systems operating simultaneous counting circuits.
（実施例）
本発明の液体シンチレーション計数装置の作用効果を検
証するために、実施例１ （第１図）及び実施例２（第
２図）で示される本発明の２形式の液体シンチレーショ
ン計数装置を市販の従来型の装置と比較実験を行った。(Example) In order to verify the effect of the liquid scintillation counting device of the present invention, two types of liquid scintillation counting device of the present invention shown in Example 1 (FIG. 1) and Example 2 (FIG. 2) were prepared. We conducted a comparative experiment with a commercially available conventional device.
１）実験装置概要
実施例１、実施例２とも、１００ ｍｌバイアル３を測
定対象とし、内径５０ ＋１ＩＩｌφの反射筒２（内面
に反射材として酸化マグネシウム粉を塗布した）に光電
子増倍管結合用貫通孔を設けた口径４６ＩｌｌＩＩｌφ
の石英窓光電子増倍管１をバイアル瓶３に面するように
水平に１２０°間隔で３本配置した。1) Overview of experimental equipment In both Examples 1 and 2, a 100 ml vial 3 was measured, and a photomultiplier tube was coupled to a reflector tube 2 with an inner diameter of 50 + 1IIlφ (the inner surface of which was coated with magnesium oxide powder as a reflective material). Diameter 46IllIIlφ with through hole
Three quartz window photomultiplier tubes 1 were arranged horizontally at 120° intervals so as to face the vial 3.
叉１班−１
光電子増倍管１からの出力をプリアンプ（図では省略）
で増幅後、コンスタントフラクションディスクリシネ−
ター回路（図では省略）でパルス巾を１５ナノ秒に成形
したタイミング信号４を、３系統中２系統作動同時計数
回路１１と３系統中３系統作動同時計数回路１２の動作
選択が切替スイッチ１４によって行える同時計数回路１
３に導いた。一方、スペクタル分析（波高分析）を行う
ため、各光電子増倍管１からの波形（リニア）信号５を
サムアンプで加え、リニアアンプ（図では省略）で増幅
後、リニアゲート回路７のリニア信号入力部９に入力し
た。同時計数回路１３からの出力信号をタイミング調整
用ゲートアンドディレ７のゲート信号入力部８に入力し
、それと同調した放射線信号のみを多重波高分析器（マ
ルチチャンネルアナライザー）１０に入力した。Fork 1 Group-1 Preamplifies the output from photomultiplier tube 1 (omitted in the diagram)
After amplification, constant fraction discretization
The timing signal 4, which has a pulse width of 15 nanoseconds in a pulse circuit (not shown), is selected by a switch 14 to select the operation of the coincidence circuit 11 that operates on two of the three systems and the coincidence circuit 12 that operates on three of the three systems. Coincidence circuit 1 that can be performed by
It led to 3. On the other hand, in order to perform spectral analysis (wave height analysis), the waveform (linear) signal 5 from each photomultiplier tube 1 is added by a sum amplifier, and after being amplified by a linear amplifier (not shown), the linear signal is input to the linear gate circuit 7. I entered it in section 9. The output signal from the coincidence circuit 13 was input to the gate signal input section 8 of the timing adjustment gate and delay 7, and only the radiation signal synchronized therewith was input to the multiple wave height analyzer (multichannel analyzer) 10.
尖胤桝−１
３系統中２系統作動同時計数回路１１と３系統中３系統
作動同時計数回路１２を同時に作動させるために、分岐
回路１３でタイミング信号４を分岐して両回路１１．１
２に入力した。その他の回路系は実施例１と同じである
。Chitanemasu-1 In order to simultaneously operate two of the three systems operating coincidence circuit 11 and three of the three systems operating coincidence circuit 12, the timing signal 4 is branched at the branch circuit 13 and both circuits 11.1
I entered 2. The other circuit systems are the same as in the first embodiment.
２）実験及び結果
（１）効率の比較
バイアル瓶に市販の液体シンチレータ−（アクアゾルＩ
ｆ） １００ ｍｌ、標準トリチウム水１＋ｎｌ及び微
量の四塩化炭素を加えた試料７本を作った。この際、四
塩化炭素の量を増減し、それぞれに効率の異なる液体シ
ンチレーションサンプルとした。2) Experiments and results (1) Comparison of efficiency A commercially available liquid scintillator (Aquasol I) was placed in a vial.
f) Seven samples were prepared by adding 100 ml of standard tritiated water (1+nl) and a trace amount of carbon tetrachloride. At this time, the amount of carbon tetrachloride was increased or decreased to create liquid scintillation samples with different efficiencies.
これらのサンプルを用いて、従来型との比較を行った。Using these samples, a comparison was made with the conventional type.
結果は第３図に示す。The results are shown in Figure 3.
第３図において、横軸は四塩化炭素の量に関係する外部
標準線源比、縦軸は効率である。In FIG. 3, the horizontal axis is the external standard source ratio related to the amount of carbon tetrachloride, and the vertical axis is the efficiency.
この結果より、例えば外部標準線源比が最小のサンプル
（四塩化炭素含有量が最大のもの）の効率は、従来型で
は１０％で、本発明では１５％と１．５倍に改善され、
また、外部標準線源比が最大のサンプル（四塩化炭素含
有量が最小のもの）でも、効率は、従来型では３５％、
本発明では４６％と１．３倍に改善されており、本発明
が、効率の点において、従来型より優れていることが実
証された。From this result, for example, the efficiency of the sample with the minimum external standard source ratio (the one with the maximum carbon tetrachloride content) was 10% with the conventional method, but with the present invention it was 15%, an improvement of 1.5 times.
In addition, even for the sample with the highest external standard source ratio (the one with the lowest carbon tetrachloride content), the efficiency was 35% for the conventional type,
The present invention showed an improvement of 1.3 times to 46%, demonstrating that the present invention is superior to the conventional type in terms of efficiency.
なお、実施例１と実施例２の効率には、優劣は見られな
かった。Note that no superiority or inferiority was observed between the efficiency of Example 1 and Example 2.
（２）化学発光除去性能の比較
市販の液体シンチレータ−（アクアゾル■）、過酸化水
素水ｌｌ１ｌ、水酸化ナトリウム２０χ水ｌｌｌ１ｌを
バイアル瓶にて混合し、放射能を含有しない化学発光サ
ンプルを調整した。この化学発光サンプルを市販の従来
型装置と本実施例の装置で測定した。結果を第４図に示
す。(2) Comparison of chemiluminescence removal performance A commercially available liquid scintillator (Aquasol ■), 1 liter of hydrogen peroxide solution, and 1 liter of sodium hydroxide 20× water were mixed in a vial to prepare a chemiluminescent sample containing no radioactivity. . This chemiluminescence sample was measured using a commercially available conventional device and the device of this example. The results are shown in Figure 4.
第４図において、横軸はサンプル調整績の経過時間、縦
軸は化学発光計数率である。In FIG. 4, the horizontal axis represents the elapsed time of the sample preparation results, and the vertical axis represents the chemiluminescence count rate.
サンプル調整５分後における化学発光計数率が従来型で
は２０００ ｃｐｓ （ｃｏｕｎｔｓ ｐｅｒ ｍ１ｎ
ｕｔｅ 、毎分当りのカウント数）以上であるのに対し
て、本発明の装置ではＯｃｐ＋＊ であった。この結
果から本発明の装置は、化学発光除去性能の点において
従来型よりも格段に優れていることが判明した。The chemiluminescence count rate after 5 minutes of sample preparation is 2000 cps (counts per m1n) with the conventional model.
ute, counts per minute), whereas in the device of the present invention it was Ocp+*. These results revealed that the device of the present invention was significantly superior to the conventional type in terms of chemiluminescence removal performance.
なお、実施例１と実施例２の化学発光除去性能には、優
劣は見られなかった。Note that no superiority or inferiority was observed between the chemiluminescence removal performance of Example 1 and Example 2.
（３）測定モード選択の煩雑さ
実施例１、実施例２とも、化学発光のあるサンプルも、
化学発光のないサンプルも一台の装置で計数できるので
、測定モード選択の煩雑さはなかった。実施例２では回
路選択スイッチ切替えの手間が省け、より便利であった
。(3) Complexity of measurement mode selection In both Examples 1 and 2, even samples with chemiluminescence
Since even samples without chemiluminescence can be counted with one device, there is no need to choose a measurement mode. In the second embodiment, the trouble of switching the circuit selection switch was saved, and it was more convenient.
第１図は、本発明の液体シンチレーション計数装置の一
興体例（実施例１）の構造回路図である。
図において、
■ 光電子増倍管 ２ 反射筒
３ バイアル瓶 ４ タイミング信号５ 波形
（リニア信号） ６ サムアンプ７ リニアゲート回
路
８ ゲート信号入力部
９ リニア信号入力部
１０ 多電波高分析器
（マルチチャンネルアナライザー）
１１ ３系統中２系統作動同時計数回路１２３系統中３
系統作動同時計数回路
１３ 同時計数回路
１４ 切替スイッチ
第２図は、本発明の液体シンチレーション計数装置の他
の具体例（実施例２）の構造回路図である。
図において、
１ 光電子増倍管 ２ 反射筒
３ バイアル瓶 ４ タイミング信号５ 波形
（リニア信号） ６ サムアンプ７ リニアゲート回路
Ｂ ゲート信号入力部
９ リニア信号入力部
１０ 多重波高分析器
（マルチチャンネルアナライザー）
１１ ３系統中２系統作動同時計数回路１２３系統中３
系統作動同時計数回路
１３ 分岐回路
第３図は、従来型と本発明の装置の効率を比較した実験
結果を示すグラフである。
図において、
横軸は外部標準線源比、縦軸は効率で、Ｉ％Ｉ１１は従
来型、線２は本発明の装置の結果を示す。
第４図は、従来型と本発明の装置の化学発光除去性能を
比較した実験結果を示すグラフである。
図において、
横軸は経過時間（分）、縦軸は化学発光計数率で、線１
は従来型、線２は本発明の装置の結果を示す。
＃３ 図
−Ａ
秦４凹
手続補正書印釦
昭和６１年１０月２０１１
特許庁長官 黒 １）明 雄 殿
１、事件の表示
昭和６１年特許願第１９７９８６号
２、発明の名称
液体シンチレーション計数装置
３、補正をする者
事件との関係 特許出願人
東京都千代田区内幸町二丁目２番２号
日本原子力研究所 （ＩＶ、／’Ｉ’＋）４、代理人
住所 ■１０４東京都中央区銀座８丁目１５番１０号手
続補正書
昭和６１年１２月２６日
特許庁長官 黒 １）明 雄 殿
１、事件の表示
昭和６１年特許願第１９７９８６号
２、発明の名称
液体シンチレーション計数装置
３、補正をする者
事件との関係 特許出願人
住所 東京都千代田区内幸町二丁目２番２号名称 （４
０９） 日本原子力研究所
４、代理人
住所 ■１０４東京都中央区銀座８丁目１５番１０号銀
座ダイヤハイツ４１０号
明細書の〔特許請求の範囲〕及び〔発明の詳細な説明〕
の欄明細書の〔特許請求の範囲〕を下記のとおり訂正す
る。
「バイアル瓶に面するように配置された３本の光電子増
倍管（ａ）、各光電子増倍管の三つのタイミング信号を
同時計数するための３系統中２系統作動同時計数回路（
ｂ）及び各光電子増倍管の三つのタイミング信号を同時
計数するための３系統中３系統作動同時計数回路（ｃ）
から成る液体シンチレーション計数装置（ここに、３系
統中２系統作動同時計数回路とは、三つの信号入力部（
Ａ。
Ｂ、Ｃ）を有し、そのうちの少なくとも二つの信号入力
部（ＡとＢ、ＢとＣ，ＣとＡ、ＡとＢとＣ）に決められ
た時間幅（分解時間）内にパルス入力が起これば、同時
計数信号パルスが出力するものであり、３系統中３系統
作動同時計数回路とは、三つの信号入力部を有し、三つ
の信号入力部会てにパルス入力が分解時間内に起きれば
、同時計数信号パルスが出力するものである。」
明細書第３頁９行目の「混合した時化学的励起」を「混
合した時、化学的励起ｊに訂正する。
明細書第７頁１５行目の「スペクタル分析」をｒスペク
トル分析」に訂正する。
”ＡｍＷ５ｈ ’１ ｊ＋’−ｉｊ ｔＪ ｅｊ ／Ｊ
’す”ＡＩＭＷ５Ｆ＋ ４７４１ ＋Ｊ ＩＪ Ｅ：Ｉ
で下記のとおり訂正する。
ｒ作動同時計数回路で落とされる事象も観測でき、これ
により従来型よりも高効率が得られる。ここに、３系統
中２系統作動同時計数回路とは、三つの信号入力部（Ａ
、Ｂ、Ｃ）を有し、そのうちの少なくとも二つの信号入
力部（ＡとＢ、ＢとＣ１ＣとＡ。FIG. 1 is a structural circuit diagram of a liquid scintillation counting device according to the present invention (Example 1). In the figure: ■ Photomultiplier tube 2 Reflector tube 3 Vial bottle 4 Timing signal 5 Waveform (linear signal) 6 Sum amplifier 7 Linear gate circuit 8 Gate signal input section 9 Linear signal input section 10 Multi-radio wave height analyzer (multi-channel analyzer) 11 2 out of 3 systems operating coincidence circuit 3 out of 123 systems
System operation coincidence circuit 13 Coincidence circuit 14 Changeover switch FIG. 2 is a structural circuit diagram of another specific example (Example 2) of the liquid scintillation counting device of the present invention. In the figure, 1 photomultiplier tube 2 reflector tube 3 vial bottle 4 timing signal 5 waveform (linear signal) 6 sum amplifier 7 linear gate circuit B gate signal input section 9 linear signal input section 10 multiple wave height analyzer (multichannel analyzer) 11 2 out of 3 systems operating coincidence circuit 3 out of 123 systems
System Operated Coincidence Circuit 13 Branch Circuit FIG. 3 is a graph showing the results of an experiment comparing the efficiency of the conventional type and the device of the present invention. In the figure, the horizontal axis shows the external standard source ratio, the vertical axis shows the efficiency, I%I11 shows the conventional type, and line 2 shows the results of the device of the present invention. FIG. 4 is a graph showing the results of an experiment comparing the chemiluminescence removal performance of the conventional type and the device of the present invention. In the figure, the horizontal axis is the elapsed time (minutes), the vertical axis is the chemiluminescence count rate, and line 1
Line 2 shows the results of the conventional device and line 2 shows the results of the device of the present invention. #3 Figure-A Qin 4 concave procedure amendment seal button October 1986 2011 Commissioner of the Patent Office Black 1) Akio Yu 1, Display of the case 1986 Patent Application No. 197986 2, Name of the invention Liquid scintillation counting device 3. Relationship with the case of the person making the amendment Patent applicant Japan Atomic Energy Research Institute, 2-2-2 Uchisaiwai-cho, Chiyoda-ku, Tokyo (IV, /'I'+) 4, Agent's address: ■104 8, Ginza, Chuo-ku, Tokyo Chome 15-10 Procedural Amendment December 26, 1985 Commissioner of the Patent Office Kuro 1) Akio Yu 1, Indication of the case 1986 Patent Application No. 197986 2, Name of the invention Liquid scintillation counting device 3, Amendment Relationship with the case of the person who filed the patent application Address of the patent applicant: 2-2-2 Uchisaiwai-cho, Chiyoda-ku, Tokyo Name (4)
09) Japan Atomic Energy Research Institute 4, Agent Address ■104 Ginza Dia Heights 410, 8-15-10, Ginza, Chuo-ku, Tokyo [Claims] and [Detailed Description of the Invention]
The [Claims] of the description in column 2 is corrected as follows. ``Three photomultiplier tubes (a) arranged to face the vial, two out of three systems operating coincidence circuit for simultaneously counting the three timing signals of each photomultiplier tube (
b) and a coincidence circuit (c) for simultaneous counting of the three timing signals of each photomultiplier tube.
A liquid scintillation counting device (herein, a simultaneous counting circuit that operates on two of the three systems is a liquid scintillation counting device that consists of three signal input sections (
A. B, C), and at least two of them (A and B, B and C, C and A, A, B and C) have a pulse input within a determined time width (resolution time). If this occurs, a coincidence signal pulse is output.A three-system operating coincidence circuit has three signal input sections, and the pulse input to the three signal input sections is output within the resolution time. If this happens, a coincidence signal pulse will be output. ” "Chemical excitation when mixed" on page 3, line 9 of the specification is corrected to "chemical excitation when mixed.""Spectralanalysis" on page 7, line 15 of the specification is changed to "r spectral analysis." Correct. ”AmW5h '1 j+'-ij tJ ej /J
'S'AIMW5F+ 4741 +J IJ E:I
Please make the following corrections. Events dropped in the r-actuated coincidence circuit can also be observed, resulting in higher efficiency than conventional types. Here, the simultaneous counting circuit that operates on two of the three systems means three signal input sections (A
, B, C), of which at least two signal input sections (A and B, B and C1C and A.
Claims (1)
管（ａ）、各光電子増倍管の三つのタイミング信号を同
時計数するための３系統中２系統作動同時計数回路（ｂ
）及び各光電子増倍管の三つのタイミング信号を同時計
数するための３系統中３系統作動同時計数回路（ｃ）か
ら成る液体シンチレーション計数装置（ここに、２系統
中２系統作動同時計測回路とは、三つの信号入力部（Ａ
、Ｂ、Ｃ）を有し、そのうちの少なくとも二つのの信号
入力部（ＡとＢ、ＢとＣ、ＣとＡ、ＡとＢとＣ）に決め
られた時間幅（分解時間）内にパルス入力が起これば、
同時計数信号バルスが出力するものであり、３系統中３
系統作動同時計数回路とは、三つの信号入力部を有し、
三つの信号入力部全てにパルス入力が分解時間内に起き
れば、同時計数信号バルスが出力するものである）。Three photomultiplier tubes arranged to face the vial (a), two out of three systems operating coincidence circuit (b) for simultaneously counting the three timing signals of each photomultiplier tube
) and a liquid scintillation counting device (c) consisting of a simultaneous counting circuit (c) for simultaneous counting of three timing signals of each photomultiplier tube (two of the two systems operating simultaneously). has three signal input sections (A
. If an input occurs,
This is the output of the coincidence signal pulse, and 3 out of 3 systems.
A grid-operated coincidence circuit has three signal inputs,
If pulse inputs to all three signal inputs occur within the resolution time, a coincidence signal pulse will be output).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19798686A JPH0616107B2 (en) | 1986-08-26 | 1986-08-26 | Liquid scintillation counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19798686A JPH0616107B2 (en) | 1986-08-26 | 1986-08-26 | Liquid scintillation counter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6355485A true JPS6355485A (en) | 1988-03-09 |
| JPH0616107B2 JPH0616107B2 (en) | 1994-03-02 |
Family
ID=16383609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19798686A Expired - Fee Related JPH0616107B2 (en) | 1986-08-26 | 1986-08-26 | Liquid scintillation counter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0616107B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7175457B2 (en) | 2003-09-30 | 2007-02-13 | J.S.T. Mfg. Co., Ltd. | Fast transmission-use connector |
| JP2007178336A (en) * | 2005-12-28 | 2007-07-12 | Mitsubishi Electric Corp | Water monitor |
| JP2009276317A (en) * | 2008-05-19 | 2009-11-26 | Aloka Co Ltd | Liquid scintillation counter |
| JP2012047517A (en) * | 2010-08-25 | 2012-03-08 | National Institute Of Advanced Industrial & Technology | Radioactivity absolute measurement method by liquid scintillation, and calibration method of radioactivity measuring device |
| CN107894606A (en) * | 2017-11-20 | 2018-04-10 | 浙江大学 | The test bottle of carbon 14, test device and method, sample sample-preparing system and method |
-
1986
- 1986-08-26 JP JP19798686A patent/JPH0616107B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7175457B2 (en) | 2003-09-30 | 2007-02-13 | J.S.T. Mfg. Co., Ltd. | Fast transmission-use connector |
| JP2007178336A (en) * | 2005-12-28 | 2007-07-12 | Mitsubishi Electric Corp | Water monitor |
| JP4659612B2 (en) * | 2005-12-28 | 2011-03-30 | 三菱電機株式会社 | Water monitor |
| JP2009276317A (en) * | 2008-05-19 | 2009-11-26 | Aloka Co Ltd | Liquid scintillation counter |
| JP2012047517A (en) * | 2010-08-25 | 2012-03-08 | National Institute Of Advanced Industrial & Technology | Radioactivity absolute measurement method by liquid scintillation, and calibration method of radioactivity measuring device |
| CN107894606A (en) * | 2017-11-20 | 2018-04-10 | 浙江大学 | The test bottle of carbon 14, test device and method, sample sample-preparing system and method |
| CN107894606B (en) * | 2017-11-20 | 2019-07-02 | 浙江大学 | Carbon-14 test bottle, test device and method sample sample-preparing system and calculation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0616107B2 (en) | 1994-03-02 |
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